Disk drill.



PATENTED NOV. 1.3, 1906.

J. M. PIERCE.

. DISK DRILL.

APPLICATION FILED JULY 17. 1905.

2 SHEETS-SHEET 1.

mm fla r/M m m mm 1 N M m M N/T/YEJSES THE mmms PETERS cm, WASHINGTON. n. c.

No. 836,051. PATENTED NOV.13, 1906.

- J. M. PIERCE. I

DISK DRILL.

APPLICATION FILED JULY17. 1905.

2 SHBETSSHET 2.

UNITED srAg ls PATENT OFFICE.

JAMES M. PIERCE, OF OWATONNA, MINNESOTA, ASSIGNOR TO OWATONNA MANUFACTURING (30., OF OWATONNA, MINNESOTA.

DISK DRILL.

Specification of Letters Patent.

Patented Nov. 13, 1906.

To all whom it may concern:

Be it known that I, JAMEs M. PIERCE, of Owatonna, Steele county, Minnesota, have invented certain new and useful Improvements in Disk Drills, of which the following is a specification.

My invention relates particularly to singledisk drills.

The object of my invention is to provide an improved form of scraper for the convex surface of the disk.

A further object is to provide improved I means for connecting the drag-barto the tional view on the line y y of Fig. 2.

end of the arm 4 by a bolt 8.

disk and rendering the disk adjustable to vary its angle with respect to the draft-line.

The invention consists generally in various constructions and combinations, all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of a single disk and boot embodying my invention. Fig. 2 is a horizontal section on the line as as of Fig. 1. Fig. 3 is a side elevation of a drill-disk and boot looking at the concave side of the disk. Fig. 4 is Fa secig. 5 is a detail view looking toward the inner side of the arm, showing the bearing therein.

In the drawings, 2 represents an ordinary concavo convex disk, and 3 an open boot having a forwardly-extending downwardlycurved arm 4. (Shown in the drawings as bolted to the boot; but it may be formed integrally therewith.) The disk 2 has a central orifice 5 and a hub 6 arranged on the concave side of the disk, having an end 7 projecting through said orifice and secured to the lower The end 7 has slots 9 to receive lugs 10 on said arm, and a washer 11 is provided between said arm and the surface of the disk to form a dust-proof joint at that point. The lugs and slots prevent the arm from working loose and moving back and forth on the hub. A shoulder 12 is provided near the opposite end of the hub, and a cap 13, having an orifice 14 to receive the end 15 of the hub, bears upon the said shoulder and is secured to the d1sk by rivets 16 or any other suitable means. The surface of the hub end 15 is beveled, as shown in Fig. 2, and a drag-bar 16 is secured to said surface by a bolt 17, a washer 18 being provided between the said drag-bar and the cap 13.

By loosening the bolt 17 and changing th position of the hub with respect to the dragbar the angle of the disk with respect to the line of travel may also be changed, the degree of variation depending, of course, upon the bevel on the end of the hub. This bevel may be increased or decreased according to the desired adjustment of the disk. The bevel at the end of the hub is very slight and is hardly noticeable in the drawings, although exaggerated, a little variation in the surface being sufficient to cause a considerable tilt of the disk one way or the other, according to the position of the hub with respect to the drag-bar. An oil-cup 19 is provided on the arm 4. and communicates with a socket leading to the bearing. The lower end of the boot 3 is provided with a reduced extension or stem 20, whereon the scraper 21 is secured by means of a clamp 22. The blade 23 of the scraper is upwardly curved and is substantially sickle-shaped and adapted to bear on the convex side of the disk and keep the same clean and free from mud and dirt. The clamp device allows the scraper to be easily and quickly removed from the boot for substitution or repairs and also allows it to be adjusted about the longitudinal axis of the boot to take up the wear of the blade on the disksurface and permit the blade to be set up snugly against said surface. The upper edge of the scraper is provided with a gradual curve merging into the surface of the boot to prevent, as far as possible, the collection or accumulation of refuse matter between the boot and the disk.

As shown in Fig. 1, a comparatively large oval opening is formed between the scraperblade and the arched arm 4., and consequently there will .be but little danger of mud and refuse lodging therein, a trouble that is frequently experienced where small openings are rovided with a sharp angle between the blacib and the lower end of the pocket.

I claim as my invention 1. In a single-disk drill, the combination, with a boot provided with a forwardly-extending downwardly-curved arm, of a concavo-convex disk, a hub secured at one end to the lower end of said arm, the other end of said hub being beveled, means securing said hub to said disk, and a drag-bar-secured to the beveled end of said hub.

2. In a single-disk drill, the combination,

with a boot provided with a forwardly-extending downwardly-curved arm, of a concavo-convex disk having a central orifice, a hub having one end projecting through said orifice and secured to the lower end of said arm, the opposite end of said hub being beveled, a cap having an orifice to receive the beveled end of said hub and secured to the concave side of said disk, and a drag-bar secured to the beveled end of said hub, sub- I s'tantially as described.

3. The combination with a boot, of a scraper secured to the lower end of said boot and forming a continuation of the toe thereof, and said scraper being adjustable about the longitudinal axis of said boot.

4. In a single-disk drill, the combination with a boot provided with a forwardly-extending arm, of a concavo-convex disk mounted on said arm, and a scraper-blade secured to the lower end of said boot and forming a continuation thereof and adapted to bear on the convex side of said disk, and said blade being detachable from said boot and adjustable about the longitudinal axis of the same, substantially as described.

5. In a grain-drill, a boot, a disk journaled forwardly thereof, a scraper having a blade to bear on said disk, and a clamping device arranged to embrace the toe of said boot, and detachably securing said scraper thereon, substantially as described.

6. In a disk drill, the combination, with a boot provided with a forwardly-extending arm, of a hub secured at one end on said arm, a disk j ournaled on said hub and a drag-bar connected with said hub, said connection being inclined with respect to the vertical lane of said disk, whereby upon rotating sai hub the angle of said disk with respect to said bar will be changed to vary the width of the furrow.

7. In a disk drill, the combination with a boot provided with a reduced extension or stem at its lower end, of a concavo-convex disk, and a scraper having a clamp for securing it to said extension, and a blade to bear upon the surface of said disk, substantially as described.

8. In a grain-drill, a boot, a disk forwardly journaled thereof, a scraper having a blade to bear on said disk, and a clamping arrangement to embrace the toe of said boot and detachably and adjustably securing said scraper thereon, substantially as described.

9. In a grain-drill, a boot, a disk j ournaled forwardly thereof, a scraper having a blade to bear on said disk, and a clamping device embracing the toe of said boot and adjustably securing said scraper thereon, substantially as described.

In witness whereof I have hereunto set my hand this 11th day of July, 1905.

JAMES M. PIERCE.

Witnesses:

W. A. SPERRY, F. O. KINYoN. 

